EP1794500B1 - Bougie avec crayon de prechauffage a montage elastique - Google Patents

Bougie avec crayon de prechauffage a montage elastique Download PDF

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Publication number
EP1794500B1
EP1794500B1 EP05707790.1A EP05707790A EP1794500B1 EP 1794500 B1 EP1794500 B1 EP 1794500B1 EP 05707790 A EP05707790 A EP 05707790A EP 1794500 B1 EP1794500 B1 EP 1794500B1
Authority
EP
European Patent Office
Prior art keywords
sheathed
housing
heater plug
glow plug
elastic elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05707790.1A
Other languages
German (de)
English (en)
Other versions
EP1794500A1 (fr
Inventor
Thomas Ludwig
Andreas Reissner
Oliver Glock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1794500A1 publication Critical patent/EP1794500A1/fr
Application granted granted Critical
Publication of EP1794500B1 publication Critical patent/EP1794500B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
    • G01L23/10—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by pressure-sensitive members of the piezoelectric type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/028—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs the glow plug being combined with or used as a sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F23Q2007/002—Glowing plugs for internal-combustion engines with sensing means

Definitions

  • the invention relates to a glow plug for a fuel engine, consisting essentially of a plug housing and a glow plug electrically connected to the plug housing, and an integrated pressure sensor.
  • Diesel engines require a source of heat for good starting and warming behavior at low temperatures, which preheat either the gas mixture, the intake air or the combustion chamber.
  • glow plugs are generally proposed. These consist of a plug housing and a projecting from the plug housing glow plug, which protrudes in its assembled state into the combustion chamber of a fuel engine.
  • the glow plugs of the glow plugs protrude by 4 mm into the combustion chamber of the fuel engine and heat the diesel-air mixture. Achieved annealing temperature and afterglow time of the glow plug have a significant influence on the exhaust behavior, the fuel consumption of the fuel engine and the idling behavior after the start.
  • Sensor-integrated concepts in which a pressure sensor is arranged on or in the glow plug have the advantage that no additional borehole has to be provided in the fuel engine. This advantage increases all the more because in modern fuel engines, the space for attaching additional sensors is very limited.
  • glow plugs are pressed firmly into the plug housing in glow plugs, in order to ensure good ground coupling and sealing.
  • a sensor mounted within the glow plug has to detect the minimum change in length (in the order of magnitude) of the glow plug during high-pressure application, for which a piezo sensor is suitable.
  • the object of the invention is to develop a glow plug with integrated pressure sensor such that a clear measurement with a sufficient signal / noise ratio is made possible.
  • the solution of the problem is that elastic elements are provided, which are located between the inner surface of the Kerzengehauses and the glow plug, which form an electrical contact both to a part of the inner surface of the plug housing as part of the pin surface, which in a force effect the glow plug are deformable and which allow a relative movement between the glow plug and the housing, wherein the elastic elements occupy a defined position with respect to the plug housing and wherein the glow plug has a radial projection on which the elastic elements are located on both sides.
  • the glow plug can perform a macroscopic movement relative to the housing.
  • the deformation of the conductive elastic elements ensures at the same time that this at any time both with the Glow pin and is connected to the housing, whereby the electrical connection is always guaranteed.
  • the glow plug can move in relation to the housing. This movement is significantly greater than the change in length, which experiences the glow plug pin when pressure due to their material properties.
  • the force that he experiences through the pressure change in the combustion chamber pass on a built-in glow plug or the glow plug downstream pressure sensor.
  • the elastic elements have a hysteresis-free as possible elasticity.
  • the relative movement of the glow plug thus does not depend on the direction of the force, but from the displacement of the glow plug relative to the plug housing can be directly read the force, regardless of whether the pressure in the combustion chamber increases or decreases.
  • the elastic As a material that has a good electrical conductivity, the elastic is deformable and thereby a minimal hysteresis the elastic deformation shows, for example, copper alloys come into question. These are also suitable as a seal and are corrosion resistant.
  • the calibration of the measuring system, to which the glow plug itself is assigned, requires that it assumes its original position again.
  • the elastic elements must therefore according to the invention occupy a defined position with respect to the fixed housing.
  • an adjustment of the position of the elastic elements via a support within the housing.
  • the bearing surface can point to the combustion chamber side.
  • the elastic elements which preferably have a ring shape, are pressed around the glow plug and into the housing from the side facing the combustion chamber, and crimping can prevent the elastic elements from slipping out of the housing.
  • the support surface to the connection side of the glow plug In an alternative embodiment, the support surface to the connection side of the glow plug.
  • the elastic element During assembly, in this case, the elastic element must be pressed from the connection side around the glow plug and into the housing.
  • an adjustment of the position of the elastic elements is preferably carried out via a mounted inside the housing press ring.
  • the positioning of the elastic elements can also be carried out with combinations of the listed fixations.
  • the glow plug has at least one radial projection on which the elastic elements are located on both sides.
  • the protrusion may be in contact with the housing and improve electrical conduction.
  • the projection leads to a force deflection. While shear forces are exerted on the elastic element in a pure surface contact between the elastic element and the outer surface of the glow plug, the force transmitted by the projection is applied to the elastic element in the axial direction. If, in addition, elastic elements are located on both sides of the projection, one of the elastic elements is compressed with one axial force on the glow plug, one stretched. A possible, hysteresis-related deviation of compression and extension can be eliminated in this way.
  • the elastic elements are in the form of a tension spring element.
  • a tension spring element With a tension spring element, the elasticity can be increased, since the modulus of elasticity is not only due to the material property, but also due to the design geometry.
  • an elasticity can be selected which can be optimally adapted to the pressure sensor.
  • the pressure sensor can be provided in the immediate vicinity of the elastic element or detect the movement of the glow plug elsewhere.
  • a sensor can be integrated in an elastic element, so that the distortion of the elastic element can be detected as a measure of the pressure in the combustion chamber.
  • the glow plug can be biased against the plug housing and in an unpressurized state, an elastic deformation of the elastic elements. This is canceled or reduced when pressure and thus force.
  • FIG. 1 shows a non-inventive glow plug 1. It consists of a candle housing 2 and a ceramic glow plug. 3
  • an electrically conductive, elastic element 4 which is designed in the form of a ring element. With its inner surface 5 it forms a surface contact 6 with a part of the glow plug surface 7, with its outer surface 8 a further surface contact 9 with a part of the inner surface 10 of the plug housing 2.
  • the surface contacts 6, 9 ensure the electrical connection between the plug housing 2 and glow plug.
  • the deformability of the elastic element 4 causes a force acting on the glow plug 1, For example, by an increase in pressure in the combustion chamber, not shown in the figure, the glow plug 3 can perform a movement relative to the plug housing 2.
  • the quantity of movement can be detected by a sensor also not shown in the figure and serves as a measure of the pressure present in the combustion chamber.
  • the elastic element 4 is held on the connection side by means of a mounted on the plug housing 2 supporting surface 11 in position. On assembly side, the elastic element can be slipped over the glow plug 3 and pressed from the combustion chamber side 13 in the direction of the connection side 14 against the support surface 11, then the fixation takes place by means of crimping 12.
  • FIG. 2 shows a detail view of the cut FIG. 1 , Shown are the surface contacts 6, 9, on the one hand between the outer side 8 of the elastic member 4 and a part of the inner surface 10 of the plug housing 2, on the other hand between the inner surface 7 of the elastic member 4 and a part of the outer surface 5 of the glow plug 3. Without external pressure in the Combustion chamber are corresponding contact points 15, 15 'opposite each other. However, if an increased pressure and thus a force acting on the glow plug 3 in the connecting direction 16, so there is a shearing of elastic element and the corresponding contact points 15, 15 'move against each other. The surface contacts 6, 9 remain unaffected, so that a low-impedance Connection between the glow plug 3 and 2 candle housing is guaranteed.
  • FIG. 3 shows a second embodiment of a non-inventive glow plug 1 with the plug housing 2, glow plug 3 and elastic element 4 in a partial section.
  • the elastic element 4 is held on the combustion chamber side by a support surface 111 in position, on the connection side a press ring 118 is provided for fixing.
  • the elastic element 4 is pressed from the connection side 14 in the direction of the combustion chamber side 13 against the support surface 111 and fixed by means of the press ring 118.
  • FIG. 4 shows a glow plug according to the invention 1 with a plug housing 2, a glow plug 203 and elastic elements 204, 204 'in a partial section.
  • the glow plug 203 has a radial projection 219.
  • the glow plug 203 is on the projection 219 itself in contact with the plug housing. 2
  • the arrangement according to the invention has two elastic elements 204, 204 '.
  • the one elastic element 204 rests on the combustion chamber side 13 on a bearing surface 211 located on the plug housing 2 and has contact on the connection side with the projection 219 of the glow plug 203.
  • FIG. 5 shows a further embodiment of a non-inventive glow plug 1 with a plug housing 2, a glow plug 3 and elastic member 304 in a partial section.
  • the elastic element 304 is in the form of a tension spring. This is the connection side on a mounted in the plug housing 2 supporting surface 11, the combustion chamber side, the tension spring is fixed by means of a weld 320.
  • the contact between the tension spring and glow plug 3 and 2 candle housing only takes place via surface contacts, but only at a few contact points 321.
  • the tension spring is designed so that the spring action in the radial direction 322 and thus acts a frictional engagement between the tension spring and glow plug 3 and between Tension spring and plug housing 2 is present.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)

Claims (6)

  1. Bougie à crayon de préchauffage pour un moteur à combustion interne comprenant un boîtier de bougie et un crayon de préchauffage connecté électriquement au boîtier de bougie, ainsi qu'un capteur de pression intégré, des éléments élastiques (204, 204') étant prévus entre la surface interne (10) du boîtier de bougie (2) et le crayon de préchauffage (3), les éléments élastiques (204, 204') formant un contact électrique à la fois avec une partie de la surface interne (10) du boîtier de bougie (2) et avec une partie de la surface du crayon (7) et pouvant être déformés lors de l'application d'une force sur le crayon de préchauffage (3) et permettant un mouvement relatif entre le crayon de préchauffage (3) et le boîtier (2), et les éléments élastiques (204 ; 204') adoptant par rapport au boîtier de bougie (2) une position définie, caractérisée en ce que le crayon de préchauffage (3) présente une saillie radiale (219) au niveau de laquelle se trouvent de chaque côté les éléments élastiques (204 ; 204').
  2. Bougie à crayon de préchauffage selon la revendication 1, caractérisée en ce qu'un ajustement de la position des éléments élastiques (204 ; 204') s'effectue par le biais d'un appui (11 ; 111 ; 211) à l'intérieur du boîtier (2).
  3. Bougie à crayon de préchauffage selon au moins l'une quelconque des revendications précédentes, caractérisée en ce qu'un ajustement de la position des éléments élastiques (204 ; 204') s'effectue par le biais d'une bague de pressage (118 ; 218) montée à l'intérieur du boîtier (2).
  4. Bougie à crayon de préchauffage selon au moins l'une quelconque des revendications précédentes, caractérisée en ce qu'un ajustement de la position des éléments élastiques (204 ; 204') s'effectue par le biais de points de soudage (320) appliqués sur le boîtier (2).
  5. Bougie à crayon de préchauffage selon au moins l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins un élément élastique (204, 204') se présente sous la forme d'un élément de ressort de serrage.
  6. Bougie à crayon de préchauffage selon au moins l'une quelconque des revendications précédentes, caractérisée en ce qu'un capteur de pression est disposé derrière ou à côté du crayon de préchauffage (3).
EP05707790.1A 2004-03-16 2005-01-17 Bougie avec crayon de prechauffage a montage elastique Not-in-force EP1794500B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004012673A DE102004012673A1 (de) 2004-03-16 2004-03-16 Glühstiftkerze mit elastisch gelagertem Glühstift
PCT/EP2005/050173 WO2005090865A1 (fr) 2004-03-16 2005-01-17 Bougie a crayon de prechauffage monte de façon elastique

Publications (2)

Publication Number Publication Date
EP1794500A1 EP1794500A1 (fr) 2007-06-13
EP1794500B1 true EP1794500B1 (fr) 2015-04-08

Family

ID=34960273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707790.1A Not-in-force EP1794500B1 (fr) 2004-03-16 2005-01-17 Bougie avec crayon de prechauffage a montage elastique

Country Status (5)

Country Link
US (1) US7431003B2 (fr)
EP (1) EP1794500B1 (fr)
JP (1) JP4309917B2 (fr)
DE (1) DE102004012673A1 (fr)
WO (1) WO2005090865A1 (fr)

Families Citing this family (28)

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DE102004011097A1 (de) * 2004-03-06 2005-09-22 Robert Bosch Gmbh Vorrichtung zur Erfassung des Brennraumdrucks bei einer Brennkraftmaschine
FR2869391B1 (fr) * 2004-04-27 2006-07-14 Siemens Vdo Automotive Sas Bougie de prechauffage comportant un capteur de pression
FR2884299B1 (fr) * 2005-04-12 2007-06-29 Siemens Vdo Automotive Sas Bougie de prechauffage a capteur de pression integre et corps d'une telle bougie de prechauffage
DE102005017802A1 (de) * 2005-04-18 2006-10-19 Robert Bosch Gmbh Glühstiftkerze mit Brennraumdrucksensor und Dichtelement
DE102005061879A1 (de) * 2005-12-23 2007-07-05 Robert Bosch Gmbh Glühstiftkerze
AT503662B1 (de) * 2006-04-20 2007-12-15 Piezocryst Advanced Sensorics Glühkerze mit integriertem drucksensor
JP2008002809A (ja) * 2006-06-20 2008-01-10 Denso Corp 燃焼圧センサー
DE102006041124B4 (de) * 2006-09-01 2008-06-26 Beru Ag Glühkerze mit eingebautem Drucksensor
JP2008139150A (ja) * 2006-12-01 2008-06-19 Denso Corp 燃焼圧センサ
FR2910114A1 (fr) * 2006-12-15 2008-06-20 R Et B Products Soc Par Action Bougie d'allumage pour moteur thermique.
DE102008017110B3 (de) * 2008-04-02 2009-09-10 Beru Ag Druckmessglühkerze
DE102008020510B4 (de) * 2008-04-23 2010-02-11 Beru Ag Vorrichtung und Verfahren zur Ermittlung des Brennraumdruckes
DE102008042645A1 (de) * 2008-10-07 2010-04-08 Robert Bosch Gmbh Brennraumdrucksensor
DE102009037375B3 (de) * 2009-08-12 2011-03-03 Beru Ag Glühkerze
WO2011116366A1 (fr) * 2010-03-19 2011-09-22 Federal-Mogul Ignition Company Bougie de préchauffage à liaison permanente de la pointe de sonde, résistant à un déplacement
DE102010013598B4 (de) * 2010-03-31 2012-05-24 Borgwarner Beru Systems Gmbh Glühkerze
EP2444786B1 (fr) 2010-10-20 2013-07-17 Sensata Technologies, Inc. BOUGIE DE PRÉCHAUFFAGE MUNIE de mesure de la pression pour un moteur à combustion
EP2469169B1 (fr) 2010-12-22 2017-08-16 HIDRIA AET Druzba za proizvodnjo vzignih sistemov in elektronike d.o.o. Bougie de préchauffage à manchon de réception du doigt chauffant doté d'un retroussement distal
KR101541986B1 (ko) * 2011-02-25 2015-08-04 니혼도꾸슈도교 가부시키가이샤 연소압 검지센서 장착 글로 플러그
DE102011116371A1 (de) * 2011-10-14 2013-04-18 Vladimir Borissovskiy Brennraum eines Verbrennungsmotors
DE102011087641A1 (de) * 2011-12-02 2013-06-06 Robert Bosch Gmbh Druckmesseinrichtung mit Zusatzmembran
JP5934215B2 (ja) * 2011-12-26 2016-06-15 日本特殊陶業株式会社 圧力センサ付きセラミックグロープラグ
DE102012202063A1 (de) * 2012-02-10 2013-08-14 Robert Bosch Gmbh Druckmesseinrichtung für einen Brennraumdrucksensor
JP5853837B2 (ja) * 2012-04-13 2016-02-09 株式会社豊田中央研究所 圧力センサ
KR101634093B1 (ko) * 2012-08-09 2016-06-28 봇슈 가부시키가이샤 압력 센서 일체형 글로 플러그
DE102014220343A1 (de) * 2014-10-08 2016-04-14 Ford Global Technologies, Llc Zylinderkopf für einen Dieselmotor mit Direkteinspritzung
KR102359917B1 (ko) * 2017-04-04 2022-02-07 현대자동차 주식회사 차량의 글로 플러그 및 그 제어방법
JP7313268B2 (ja) * 2019-12-20 2023-07-24 ボッシュ株式会社 グロープラグ

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Also Published As

Publication number Publication date
JP4309917B2 (ja) 2009-08-05
US20070209624A1 (en) 2007-09-13
US7431003B2 (en) 2008-10-07
EP1794500A1 (fr) 2007-06-13
JP2007507681A (ja) 2007-03-29
DE102004012673A1 (de) 2005-10-06
WO2005090865A1 (fr) 2005-09-29

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